HYNIX - IMSOURCING SK 4GB DDR3 SDRAM Memory Module - for Desktop PC, Workstation - 4 GB - DDR3-1600/PC3L-12800 DDR3 SDRAM - 1600 MHz - CL11-1.35 V - Non-ECC - Unbuffered - 240-pin - DIMM at Amazon.com
Hynix HMA851S6DJR6N-XN - 4GB DDR4 3200MHz Non-ECC SODIMM RAM PC4-25600 CL22 Memory Module for Laptops, Mini Desktops & All in One Systems at Amazon.com
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SK Hynix 4GB 1Rx8 PC4-17000 DDR4-2133 1.2volt CL15 260 Pin Sodimm Memory p/n HMA451S6AFR8N-TF at Amazon.com